marshalls.h

/*************************************************************************/
/*  marshalls.h                                                          */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#ifndef MARSHALLS_H
#define MARSHALLS_H

#include "typedefs.h"

#include "variant.h"

union MarshallFloat {

    uint32_t i; 
    float f; 
};

union MarshallDouble {

    uint64_t l; 
    double d; 
};

static inline unsigned int encode_uint16(uint16_t p_uint, uint8_t *p_arr) {

    for (int i=0;i<2;i++) {

        *p_arr=p_uint&0xFF;
        p_arr++; p_uint>>=8;
    }

    return sizeof( uint16_t );
}

static inline unsigned int encode_uint32(uint32_t p_uint, uint8_t *p_arr) {

    for (int i=0;i<4;i++) {

        *p_arr=p_uint&0xFF;
        p_arr++; p_uint>>=8;
    }

    return sizeof( uint32_t );
}

static inline unsigned int encode_float(float p_float, uint8_t *p_arr) {

    MarshallFloat mf;
    mf.f=p_float;
    encode_uint32( mf.i, p_arr );

    return sizeof( uint32_t );
}

static inline unsigned int encode_uint64(uint64_t p_uint, uint8_t *p_arr) {

    for (int i=0;i<8;i++) {

        *p_arr=p_uint&0xFF;
        p_arr++; p_uint>>=8;
    }

    return sizeof(uint64_t);
}

static inline unsigned int encode_double(double p_double, uint8_t *p_arr) {

    MarshallDouble md;
    md.d=p_double;
    encode_uint64( md.l, p_arr );

    return sizeof(uint64_t);

}


static inline int encode_cstring(const char *p_string, uint8_t * p_data) {

    int len=0;

    while (*p_string) {

        if (p_data) {

            *p_data=(uint8_t)*p_string;
            p_data++;
        }
        p_string++;
        len++;
    };

    if (p_data) *p_data = 0;
    return len+1;
}

static inline uint16_t decode_uint16(const uint8_t *p_arr) {

    uint16_t u=0;

    for (int i=0;i<2;i++) {

        uint16_t b = *p_arr;
        b<<=(i*8);
        u|=b;
        p_arr++;
    }

    return u;
}

static inline uint32_t decode_uint32(const uint8_t *p_arr) {

    uint32_t u=0;

    for (int i=0;i<4;i++) {

        uint32_t b = *p_arr;
        b<<=(i*8);
        u|=b;
        p_arr++;
    }

    return u;
}

static inline float decode_float(const uint8_t *p_arr) {

    MarshallFloat mf;
    mf.i = decode_uint32(p_arr);
    return mf.f;
}

static inline uint64_t decode_uint64(const uint8_t *p_arr) {

    uint64_t u=0;

    for (int i=0;i<8;i++) {

        uint64_t b = (*p_arr)&0xFF;
        b<<=(i*8);
        u|=b;
        p_arr++;
    }

    return u;
}

static inline double decode_double(const uint8_t *p_arr) {

    MarshallDouble md;
    md.l = decode_uint64( p_arr );
    return md.d;

}


Error decode_variant(Variant& r_variant,const uint8_t *p_buffer, int p_len,int *r_len=NULL);
Error encode_variant(const Variant& p_variant, uint8_t *r_buffer, int &r_len);

#endif